NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 951-290

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 951-290 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 951 blocks

Most active assignees, all time — NPA 951
BANDWIDTH.COM CLEC, LLC - CA 5
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
ONVOY, LLC - CA 1
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 1
LEVEL 3 COMMUNICATIONS, LLC - CA 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-03-26 951-290-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-04-05 951-290-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA
2010-06-04 951-290-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-06-04 951-290-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-08-31 951-290-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MURRIETA CA
2010-07-15 951-290-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2010-11-24 951-290-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 MURRIETA CA
2010-11-16 951-290-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-11-17 951-290-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MURRIETA CA
2010-12-07 951-290-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MURRIETA CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.